This book is devoted to the 20 anniversary of accident on the Chernobyl NPP unit 4.
History of construction, causes of the accident and its consequences, actions for
its mitigation are described. Modern situation with Chernobyl NPP decommissioning
and transferring of 'Ukryttya' shelter into ecologically safe system are mentioned.
The future of Chernobyl site and exclusion zone was discussed